The aim is to study the effects of dynamic mechanics properties and geometrical parameters of each layer material on the sound absorption properties of the multilayered polymer composites.
研究了多层高分子复合结构在斜入射声波作用下，各层材料动态力学性能参数和几何参数变化对其吸声性能的影响规律。
An exact expression of energy release rate for geometrical nonlinear elastic fracture mechanics is obtained for an infinite plate with central crack under uniform stress normal to crack surfaces.
对含中心裂纹的无限大板在裂纹表面受均匀分布压力作用的情况，导出了几何非线性弹性断裂力学的能量释放率的一个精确表达式。
Mechanics phenomenon in wire rope is explained with physical and geometrical methods. An effective approach improving fatigue life of wire rope is found.
以物理、几何等方法阐明钢丝绳内在的力学现象，找出能够提高钢丝绳疲劳寿命的有效途径。
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